4-(Bromomethyl)-3-(difluoromethyl)-5-hydroxypyridine-2-carboxaldehyde
4-(Aminomethyl)-6-iodo-2-(trifluoromethoxy)pyridine-3-carboxylic acid
3-Hydroxy-5-(trifluoromethoxy)pyridine-4-carboxaldehyde
2-(Chloromethyl)-3-(difluoromethyl)-5-hydroxy-4-(trifluoromethoxy)pyridine